APA Style

WALDRON, I., RICKLEFS, R, E. (1973). Environment and Population: Problems and solutions . New York: Holt, Rinehart and Winston, Inc..

MLA Style

WALDRON, INGRID., RICKLEFS, ROBERT, E.. "Environment and Population: Problems and solutions". New York: Holt, Rinehart and Winston, Inc., 1973. Text.